<template>
    <div class="table">
      <div class="crumbs">
        <i class="el-icon-tickets"></i>评论信息
      </div>
      <div class="container">
        <div class="handle-box">
          <el-button type="primary" size="mini" @click="delAll">批量删除</el-button>
          <el-input v-model="select_word" size="mini" placeholder="筛选关键词" class="handle-input"></el-input>
        </div>
      </div>
      <el-table size="mini" ref="multipleTable" border style="width:100%" height="680px" :data="tableData" @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="40"></el-table-column>            
        <el-table-column prop="name" label="用户名" align="center"></el-table-column>   
        <el-table-column prop="content" label="评论内容" align="center"></el-table-column>           
        <el-table-column label="操作" width="150" align="center">
          <template slot-scope="scope">
            <el-button size="mini" type="danger" @click="handleDelete(scope.row)">删除</el-button> 
          </template>
        </el-table-column>
      </el-table>
      
      <el-dialog title="删除评论" :visible.sync="delVisible" width="300px" center>
        <div align="center">删除不可恢复，是否确定删除？</div>
        <span slot="footer">
          <el-button size="mini" @click="delVisible = false">取消</el-button>
          <el-button size="mini" @click="deleteRow">确定</el-button>                
        </span>
      </el-dialog>
    </div>
</template>

<script>
import {mixin} from '../mixins/index';
import {getUserOfId,getCommentOfSongListId,deleteComment} from '../api/index';
export default {
    name: '',
    components: {},
    mixins: [mixin],
    props: ['id'],
    data () {
      return {
        delVisible: false,          //删除弹窗是否显示
        tableData: [],
        tempData: [],
        select_word: '',
        idx: -1,                    //当前选择项
        multipleSelection: [],      //哪些项已经打勾
      }
    },
    computed: {},
    watch: {
      // 搜索框里面的内容发生变化的时候，搜索结果table列表的内容跟着它的内容发生变化
      select_word: function(){
        if(this.select_word == ''){
          this.tableData = this.tempData;
        }else{
          this.tableData = [];
          for(let item of this.tempData){
            if(item.name.includes(this.select_word)){
              this.tableData.push(item);
            }
          }
        }
      }
    },
    created () {
      this.getData();
    },
    methods: {
      // 查询指定歌单的评论列表
      getData(){
        this.tempData = [];
        this.tableData = [];
        getCommentOfSongListId(this.$route.query.id).then(res => {
          for(let item of res){
            this.getUsers(item.userId,item);
          }
        })
      },
      // 获取用户名，连同本对象放到tempData和tableData里面
      getUsers(id,item){
        getUserOfId(id)
        .then(res => {
          let o = item;
          o.name = res.username;
          this.tempData.push(o);
          this.tableData.push(o);
        })
        .catch(err => {
          console.log(err);
        });
      },
      //删除一条评论
      deleteRow(){
        deleteComment(this.idx.id)
        .then(res => {
          if(res){
            this.getData();
            this.notify("删除成功","success");
          }else{
            this.notify("删除失败","error");
          }
        })
        .catch(err => {
          console.log(err);
        });
        this.delVisible = false;
      },
      //批量删除已经选择的项
      delAll(){
        for(let item of this.multipleSelection){
          this.handleDelete(item);
          this.deleteRow();
        }
        this.multipleSelection = [];
      },
    }
}
</script>
<style>
.handle-box{
  margin-bottom: 20px;
}
.handle-input{
  width: 300px;
  display: inline-block;
}
</style>